|Finding ID||Version||Rule ID||IA Controls||Severity|
|The Neighbor Discovery protocol allows a hop limit value to be advertised by routers in a Router Advertisement message to be used by hosts instead of the standardized default value. If a very small value was configured and advertised to hosts on the LAN segment, communications would fail due to the hop limit reaching zero before the packets sent by a host reached their destination.|
|HP FlexFabric Switch RTR Security Technical Implementation Guide||2020-06-03|
|Check Text ( C-66771r1_chk )|
| Review the HP FlexFabric Switch configuration to determine if the maximum hop limit has been configured. |
If the maximum hop limit is not configured, this is a finding.
If it has been configured, then it must be set to at least 32; otherwise this is a finding.
[5900CP]display current-configuration | i hop-limit
ipv6 hop-limit 255
Note: The default value for the maximum hop limit is 64.
|Fix Text (F-72201r1_fix)|
| If the max hop set is not configured then use the following command to configure it: |
[HP] ipv6 hop-limit 255